NEAREST

NEAREST
WP5.- Data Integration/ Integrated Tsunami Detection
Network:
LEADER: UGR
PARTNERS INVOLVED: FCCUL, IM, CNRST, UGR
Marrakech Meeting 25 and 26 October, 2007
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
1.- Task 5.1 Establishment of 3 data collectors for real-time automatic
processing of data (one in Portugal, the other in Spain and a 3rd one in
Morocco). This will involve:
Waveform sharing between data collectors, integration of
seismic data including OBS’s;
Integration of tide gauge data.
Integration of multiparameter data from seafloor observatory.
2.- Task 5.2 Development of automatic procedures for rapid determination
of seismic parameters and definition of thresholds for triggering the
tsunami detection procedures.
3.- Task 5.3 Development of an effective tsunami detection methodology.
Definition of thresholds for issuing different levels of alarm messages.
4.- Task 5.4.- Testing the tsunami warning system using synthetic data
streams generated at WP8.
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.1,
Dataloggers: PORTUGAL (IM)
A prototype of a data collector is already running in Lisbon,
at IM headquarters. It is based on
SEISCOMP/SEEDLINK technology implemented on a
Intel/Linux platform, and is already concentrating data, in
real-time, from eleven broad-band seismic stations
operating in centre and south Portugal Mainland (8),
South west and Centre of Spain (2, SFS and PAB) and
Morocco (1, RTC), and also from 3 extended response
SP stations from IM (2 in mainland and 1 in Madeira
island). The definitive hardware was purchased, and is
now almost fully operating.
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.1,
Dataloggers: SPAIN (UGR)
A prototype of a data collector is already running in
Granada, at IAG.
In this case the dataloguer is based on
SEISLOG/SEISNET technology implemented on
a QNX/SOLARIS platform, and is already
concentrating data, in real-time, from 13 broad-
band seismic stations + 9 SP operating in
southern Spain.
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.1,
Seismic sharing data: IM-CNRST-UGR
* IM.- The prototype is ready to allow real-time access to authorized users,
using SEEDLINK protocol, through Internet. Right now, some of the IM
broadband stations are already being accessed by CNSRT.
* At this moment waveforms sharing between IM-UGR it is carried out
under petition. No real time
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.1,
Tide-Gauge and Sea floor Observatory: IM
• Some efforts have been taken in order to integrate data from three
tide gauges located at Cascais, near Lisbon on the western coast of
Portugal Mainland, Lagos, in the southwestern coast of Algarve, and
Sines, located between San Vincent cape and Lisbon. Data from
Cascais is already being acquired and integrated within the system.
The sampling rate is still too low (6 min per sample) in order to meet
a Tsunami Warning System, but the acquisition system is being
upgraded, as for Lagos too. For both sites (belonging to IGP) data will
be made available with a sampling rate of 1 min. Regarding Sines
(belongint to IH), data will made available with a sample rate of 15
sec.
• Data from Cascais is being remotely accessed by Internet. As it will
be for Lagos and Sines, and a software tool was prepared in order to
convert data to miniSeed records that are then feed into the
SEEDLINK server of the data collector
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.1,
Second Year- UGR:
During the second year, UGR, will check and update new version of the
Seislog/Seinet based on Linux platform working under low power ARM-
architecture (Linux-embeebed).
Advantage:
It is possible to have real time waveform in the data centre
Seislog with Linux record at different formats included mseed.
Seismic stations can be interrogated by Seedlink and/or
Seisnet protocol.
Furthermore we also to test and install Seiscomp/Seedlink technology
to test the feasibility respect to our seismic network
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.2:
Fast determination of seismic parameters: (IM)
An automatic location software (AUTOLOC from
GEOFON) is running on the data concentrator.
This software could be used as a starting point
for the rapid determination procedure needed,
but it will require major developments
considering specific difficulties in fast evaluating
earthquake magnitude and hypocentre depth.
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.2:
Fast determination of seismic parameters: (UGR):
* The knowledge of the seismotectonic framework of a
tsunaminegic region, in our case the Cadiz Gulf in SW Iberia,
it is an important goal previous to define strategies to outline
algorithms suitable and efficient to use in a fast definition of
the seismic source size.
* Fortunately the numbers of high resolution broad band
seismic stations deployed in the region during the last two
years have increased significantly and allow us to investigate
important parameters related with the seismotectonic of the
region.
* There are two important data of the seismic source that has
been investigated: depth and faulting parameter of the
earthquakes in the region
WP5.- Data Integration/ Integrated Tsunami
Detection Network:
Regarding task 5.3 and 5.4:
NEAREST and NEAMTWS:
• The activities of the Portuguese have been integrated with the Portuguese
Working Group for Tsunami Studies and Early Warning (GT-IMAT). This
Working Group had already two plenary meetings and 1 working meeting
with the IM President. The GT-IMAT has the responsibility to apply in
Portugal the Implementation Plan decided in the NEAMTWS meeting in
Bonn (last February) and follow the activities of the NEAMRWS WG’s.
• The IM has been appointed the Portuguese Focal Point for the NEAMTWS
and was proposed as the Regional Watch Center for the Atlantic Area. The
discussion of tide-gauge integration has been extensively discussed in the
GT-IMAT and a good collaboration with the Hidrographic Institute (IH) is
foreseen in the near future. The main target of NEAMTWS is the
establishment of the Initial TWS by the end of 2007 and the Final TWS by
the end of 2009. As regards IM, the main shortcomings as regards its role as
RTWS are in manpower. The hiring of 4 graduated technicians is required as
the contribution from the Portuguese Government for the RTWS.
Discussions regarding these and other questions are continuing under the
GT-IAMT umbrella.
TOPOIBERIA
Seismic criteria for NEAMTWS Advisories
Depth Location (Mw Tsunami Potential Bulletin Type
or Ms)
< 100 Under or 5.0 to Very small potential for a Information
km very near 5.7 destructive local tsunami Bulletin
the sea
(~30 km) 5.8 to Potential for a destructive Local
6.5 local tsunami < 100 km Tsunami Watch
6.6 to Potential for a destructive Regional
6.8 regional tsunami < 400 km Tsunami Watch
≥ 6.9 Potential for a Ocean-wide
destructive basin-wide Tsunami Watch
tsunami > 400 km
Inland 6.0 No tsunami potential Information
Bulletin
≥ 100 All 6.0 to No tsunami potential Information
km Locations 6.4 Bulletin
≥ 100 All ≥ 6.5 Very small potential for a Information
km Locations damaging sea disturbance < Bulletin
500 km